/*
 * Copyright (c) 1987, 1991 Regents of the University of California.
 * All rights reserved.
 *
 * Portions copyright (c) 1999, 2000
 * Intel Corporation.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 * 
 *    This product includes software developed by the University of
 *    California, Berkeley, Intel Corporation, and its contributors.
 * 
 * 4. Neither the name of University, Intel Corporation, or their respective
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS, INTEL CORPORATION AND
 * CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS,
 * INTEL CORPORATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *	from: @(#)endian.h	7.8 (Berkeley) 4/3/91
 *	$Id: endian.h,v 1.1.1.1 2006/05/30 06:12:39 hhzhou Exp $
 */

#ifndef _MACHINE_ENDIAN_H_
#define	_MACHINE_ENDIAN_H_

/*
 * Define the order of 32-bit words in 64-bit words.
 */
#define	_QUAD_HIGHWORD 1
#define	_QUAD_LOWWORD 0

#ifndef _POSIX_SOURCE

/*
 * Definitions for byte order, according to byte significance from low
 * address to high.
 */
#define	LITTLE_ENDIAN	1234	/* LSB first: i386, vax */
#define	BIG_ENDIAN	4321	/* MSB first: 68000, ibm, net */
#define	PDP_ENDIAN	3412	/* LSB first in word, MSW first in long */

#define	BYTE_ORDER	LITTLE_ENDIAN

#ifndef KERNEL
#include <sys/cdefs.h>
#endif

__BEGIN_DECLS
unsigned long	htonl __P((unsigned long));
unsigned short	htons __P((unsigned short));
unsigned long	ntohl __P((unsigned long));
unsigned short	ntohs __P((unsigned short));
__END_DECLS
#if 0
#define __word_swap_long(x) \
__extension__ ({ register u_long __X = (x); \
   __asm ("rorl $16, %1" \
	: "=r" (__X) \
	: "0" (__X)); \
   __X; })

#if defined(KERNEL) && (defined(I486_CPU) || defined(I586_CPU) || defined(I686_CPU)) && !defined(I386_CPU)

#define __byte_swap_long(x) \
__extension__ ({ register u_long __X = (x); \
   __asm ("bswap %0" \
	: "=r" (__X) \
	: "0" (__X)); \
   __X; })
#else

#define __byte_swap_long(x) \
__extension__ ({ register u_long __X = (x); \
   __asm ("xchgb %h1, %b1\n\trorl $16, %1\n\txchgb %h1, %b1" \
	: "=q" (__X) \
	: "0" (__X)); \
   __X; })
#endif

#define __byte_swap_word(x) \
__extension__ ({ register u_short __X = (x); \
   __asm ("xchgb %h1, %b1" \
	: "=q" (__X) \
	: "0" (__X)); \
   __X; })
#endif

/*
 * Macros for network/external number representation conversion.
 */
//#ifdef __GNUC__
//#define	ntohl	__byte_swap_long
//#define	ntohs	__byte_swap_word
//#define	htonl	__byte_swap_long
//#define	htons	__byte_swap_word
//#else
#define ntohl(x) (u_int32_t)      \
	(((x)>>24 & 0x000000ff) | \
         ((x)>>8  & 0x0000ff00) | \
         ((x)<<8  & 0x00ff0000) | \
          (x)<<24)

#define ntohs(x)  (u_int16_t) \
	((x)>>8 & 0x00ff |    \
	 (x)<<8)

#define htonl(x)	ntohl(x)
#define htons(x)	ntohs(x)
//#endif

#define	NTOHL(x)	((x) = ntohl((u_long)(x)))
#define	NTOHS(x)	((x) = ntohs((u_short)(x)))
#define	HTONL(x)	((x) = htonl((u_long)(x)))
#define	HTONS(x)	((x) = htons((u_short)(x)))

#endif /* ! _POSIX_SOURCE */

#endif /* !_MACHINE_ENDIAN_H_ */
